Malicious PDF — malware analysis report

Static analysis result for SHA-256 59564a92e9a591c4…

MALICIOUS

PDF

73.2 KB Created: 2021-09-15 17:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 749f143662983e92bde13905da76d703 SHA-1: e9704054ad976924bddddae9e0de83bdb79a3742 SHA-256: 59564a92e9a591c4895acbf8abce8a5b0081c6894f12d0fc32f8e896b51e26e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=all+the+characters+from+paw+patrol PDF link annotation
    • http://lovelyspa.net/ckfinder/userfiles/files/4846202901.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/j3b1lak20q3upb3sct4vsk97r0/laxojabelijilodilovevusap.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/11882186127.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/ruwunudupopedu.pdfIn PDF document text
    • http://vektor28.ru/userfiles/file/belexowi.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/wizoxisilafoje.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/gejerorawaxelevalonokofof.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/20124648942.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/sibiwidovikabuzalejaxed.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133379b1a9fa---89472115922.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/vifajogiviwevizilus.pdfIn PDF document text
    • http://104408017.linker.tw/files/sezadukasaziruxivodoz.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/72773550447.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/69041418483.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/tofesiwonovakawefa.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/ladibujuwirob.pdfIn PDF document text
    • https://yellowstonewildlife.com/dorenatufijawap.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/dadegaz.pdfIn PDF document text
    • https://tiemhoamo.com/data/dulieu/files/natavobudarigub.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/33064125687.pdfIn PDF document text
    • http://metapolar.hu/tmp/zawutavutorokozopoburox.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/zivixukideninobuxaf.pdfIn PDF document text
    • http://plncse.hu/php_data/file/98830181974.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/24984529674.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A5 16848 bytes
SHA-256: 69753337b69f667b151047d8fc34068a0bbc5158c89ef49bc84ac5c3a0fe267f
font_02_sfnt_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 10616 bytes
SHA-256: ad60af35dfb7e002785fc17a04cbde8dc063a5c573df6921a2d4d9a026661812